Chair base



FIG. 1 is a perspective view of a chair base according to the present invention, with broken lines indicating portions of the chair which forms no part of the claimed invention;

FIG. 2 is a side elevational view of the base of FIG. 1, with the other side being a mirror image thereof;

FIG. 3 is a front elevational view of the base of FIG. 1;

FIG. 4 is a rear elevational view of the base of FIG. 1;

FIG. 5 is a top plan view of the base of FIG. 1; and,

FIG. 6 is a bottom plan view of a base of FIG. 1. 

The ornamental design for a chair base, as shown and described. 